I'm with Larry (seed fork) on the need to get the best equipment that you can.
The last one I bought came from Lowes, I got one of those good ones that take regular gasoline.. Those two stroke engines are real polluters....
Stringing it is easy... Haven't had the line break off inside the head yet, and I use it on blackberry briars!
Seems like its by the same company that makes those good chainsaws...
Ok googled it...
Husqvarna.
While I know what you mean about PIA pull cords, and off balance equipment and back pain....
Suggest taking ibuprofen, and be sure to wear safety goggles.